Re: [PATCH v2 2/8] arm64: perf: Abstract system register accesses away

From: Marc Zyngier <maz@kernel.org>
To: Zaid Al-Bassam <zalbassam@google.com>
Cc: Jesus Sanchez-Palencia <jesussanp@google.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	Zenghui Yu <yuzenghui@huawei.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu,
	Marc Zyngier <marc.zyngier@arm.com>
Subject: Re: [PATCH v2 2/8] arm64: perf: Abstract system register accesses away
Date: Sun, 12 Feb 2023 11:58:36 +0000	[thread overview]
Message-ID: <865yc7yu1f.wl-maz@kernel.org> (raw)
In-Reply-To: <20230210165500.2292608-3-zalbassam@google.com>

On Fri, 10 Feb 2023 16:54:54 +0000,
Zaid Al-Bassam <zalbassam@google.com> wrote:
> 
> From: Marc Zyngier <marc.zyngier@arm.com>
> 
> As we want to enable 32bit support, we need to distanciate the
> PMUv3 driver from the AArch64 system register names.
> 
> This patch moves all system register accesses to an architecture
> specific include file, allowing the 32bit counterpart to be
> slotted in at a later time.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> Co-developed-by: Zaid Al-Bassam <zalbassam@google.com>
> Signed-off-by: Zaid Al-Bassam <zalbassam@google.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Link: https://lore.kernel.org/r/20230126204444.2204061-3-zalbassam@google.com

You can drop these links. They were inserted when I picked your series
from the list, but they don't mean much at this stage.

> ---
>  arch/arm64/include/asm/arm_pmuv3.h | 149 +++++++++++++++++++++++++++++
>  drivers/perf/arm_pmuv3.c           | 115 +++++-----------------
>  include/linux/perf/arm_pmuv3.h     |  45 +++++++++
>  3 files changed, 217 insertions(+), 92 deletions(-)
>  create mode 100644 arch/arm64/include/asm/arm_pmuv3.h
> 
> diff --git a/arch/arm64/include/asm/arm_pmuv3.h b/arch/arm64/include/asm/arm_pmuv3.h
> new file mode 100644
> index 0000000000000..eb204adb8dee2
> --- /dev/null
> +++ b/arch/arm64/include/asm/arm_pmuv3.h
> @@ -0,0 +1,149 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2012 ARM Ltd.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program.  If not, see <http://www.gnu.org/licenses/>.
> + */

Please drop the license text, as we don't use this boilerplate anymore
(the SPDX tag is enough). Just keep:

/*
 * Copyright (C) 2012 ARM Ltd.
 */

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.